One doesn't have to "hear it" for it to be a material event.
The fact that Seymour is seriously considering a cockamamy Geriatric Warrant Scheme, and is a delusional tired old fossil who lost his mojo, is glaringly evident from what he said and didn't say at the meeting, when considered in its entirety.
That his highly material. Only someone who knew about the link to the actual meeting, or about the existence of the audio on a non-company message board, would be informed about it.
Ergo, the majority of investors and the investing public are not informed about how miserably Seymour performed at a gut-wrenchingly piss-poor Annual Meeting.